^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * ISHTP bus driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2012-2016, Intel Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "bus.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include "ishtp-dev.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "client.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "hbm.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static int ishtp_use_dma;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) module_param_named(ishtp_use_dma, ishtp_use_dma, int, 0600);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) MODULE_PARM_DESC(ishtp_use_dma, "Use DMA to send messages");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define to_ishtp_cl_driver(d) container_of(d, struct ishtp_cl_driver, driver)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define to_ishtp_cl_device(d) container_of(d, struct ishtp_cl_device, dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static bool ishtp_device_ready;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * ishtp_recv() - process ishtp message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * @dev: ishtp device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * If a message with valid header and size is received, then
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * this function calls appropriate handler. The host or firmware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * address is zero, then they are host bus management message,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * otherwise they are message fo clients.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) void ishtp_recv(struct ishtp_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) uint32_t msg_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct ishtp_msg_hdr *ishtp_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /* Read ISHTP header dword */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) msg_hdr = dev->ops->ishtp_read_hdr(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (!msg_hdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) dev->ops->sync_fw_clock(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) ishtp_hdr = (struct ishtp_msg_hdr *)&msg_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) dev->ishtp_msg_hdr = msg_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /* Sanity check: ISHTP frag. length in header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (ishtp_hdr->length > dev->mtu) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) dev_err(dev->devc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) "ISHTP hdr - bad length: %u; dropped [%08X]\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) (unsigned int)ishtp_hdr->length, msg_hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) /* ISHTP bus message */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) if (!ishtp_hdr->host_addr && !ishtp_hdr->fw_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) recv_hbm(dev, ishtp_hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /* ISHTP fixed-client message */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) else if (!ishtp_hdr->host_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) recv_fixed_cl_msg(dev, ishtp_hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /* ISHTP client message */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) recv_ishtp_cl_msg(dev, ishtp_hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) EXPORT_SYMBOL(ishtp_recv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * ishtp_send_msg() - Send ishtp message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * @dev: ishtp device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * @hdr: Message header
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * @msg: Message contents
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * @ipc_send_compl: completion callback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * @ipc_send_compl_prm: completion callback parameter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * Send a multi fragment message via IPC. After sending the first fragment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * the completion callback is called to schedule transmit of next fragment.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * Return: This returns IPC send message status.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) int ishtp_send_msg(struct ishtp_device *dev, struct ishtp_msg_hdr *hdr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) void *msg, void(*ipc_send_compl)(void *),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) void *ipc_send_compl_prm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) unsigned char ipc_msg[IPC_FULL_MSG_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) uint32_t drbl_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) drbl_val = dev->ops->ipc_get_header(dev, hdr->length +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) sizeof(struct ishtp_msg_hdr),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) memcpy(ipc_msg, &drbl_val, sizeof(uint32_t));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) memcpy(ipc_msg + sizeof(uint32_t), hdr, sizeof(uint32_t));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) memcpy(ipc_msg + 2 * sizeof(uint32_t), msg, hdr->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return dev->ops->write(dev, ipc_send_compl, ipc_send_compl_prm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) ipc_msg, 2 * sizeof(uint32_t) + hdr->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * ishtp_write_message() - Send ishtp single fragment message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * @dev: ishtp device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * @hdr: Message header
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * @buf: message data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * Send a single fragment message via IPC. This returns IPC send message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) * status.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) * Return: This returns IPC send message status.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) int ishtp_write_message(struct ishtp_device *dev, struct ishtp_msg_hdr *hdr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) void *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return ishtp_send_msg(dev, hdr, buf, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * ishtp_fw_cl_by_uuid() - locate index of fw client
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * @dev: ishtp device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * @uuid: uuid of the client to search
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * Search firmware client using UUID.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * Return: fw client index or -ENOENT if not found
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) int ishtp_fw_cl_by_uuid(struct ishtp_device *dev, const guid_t *uuid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) for (i = 0; i < dev->fw_clients_num; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (guid_equal(uuid, &dev->fw_clients[i].props.protocol_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) EXPORT_SYMBOL(ishtp_fw_cl_by_uuid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) * ishtp_fw_cl_get_client() - return client information to client
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) * @dev: the ishtp device structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) * @uuid: uuid of the client to search
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * Search firmware client using UUID and reture related client information.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * Return: pointer of client information on success, NULL on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) struct ishtp_fw_client *ishtp_fw_cl_get_client(struct ishtp_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) const guid_t *uuid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) spin_lock_irqsave(&dev->fw_clients_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) i = ishtp_fw_cl_by_uuid(dev, uuid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) spin_unlock_irqrestore(&dev->fw_clients_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (i < 0 || dev->fw_clients[i].props.fixed_address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return &dev->fw_clients[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) EXPORT_SYMBOL(ishtp_fw_cl_get_client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * ishtp_get_fw_client_id() - Get fw client id
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) * This interface is used to reset HW get FW client id.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) * Return: firmware client id.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) int ishtp_get_fw_client_id(struct ishtp_fw_client *fw_client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) return fw_client->client_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) EXPORT_SYMBOL(ishtp_get_fw_client_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) * ishtp_fw_cl_by_id() - return index to fw_clients for client_id
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) * @dev: the ishtp device structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) * @client_id: fw client id to search
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) * Search firmware client using client id.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) * Return: index on success, -ENOENT on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) int ishtp_fw_cl_by_id(struct ishtp_device *dev, uint8_t client_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) int i, res = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) spin_lock_irqsave(&dev->fw_clients_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) for (i = 0; i < dev->fw_clients_num; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (dev->fw_clients[i].client_id == client_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) res = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) spin_unlock_irqrestore(&dev->fw_clients_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) * ishtp_cl_device_probe() - Bus probe() callback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) * @dev: the device structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) * This is a bus probe callback and calls the drive probe function.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) * Return: Return value from driver probe() call.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) static int ishtp_cl_device_probe(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) struct ishtp_cl_device *device = to_ishtp_cl_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) struct ishtp_cl_driver *driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) if (!device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) driver = to_ishtp_cl_driver(dev->driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) if (!driver || !driver->probe)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) return driver->probe(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) * ishtp_cl_bus_match() - Bus match() callback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) * @dev: the device structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) * @drv: the driver structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) * This is a bus match callback, called when a new ishtp_cl_device is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * registered during ishtp bus client enumeration. Use the guid_t in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) * drv and dev to decide whether they match or not.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) * Return: 1 if dev & drv matches, 0 otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) static int ishtp_cl_bus_match(struct device *dev, struct device_driver *drv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) struct ishtp_cl_device *device = to_ishtp_cl_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) struct ishtp_cl_driver *driver = to_ishtp_cl_driver(drv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) return guid_equal(driver->guid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) &device->fw_client->props.protocol_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) * ishtp_cl_device_remove() - Bus remove() callback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) * @dev: the device structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) * This is a bus remove callback and calls the drive remove function.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) * Since the ISH driver model supports only built in, this is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) * primarily can be called during pci driver init failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) * Return: Return value from driver remove() call.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) static int ishtp_cl_device_remove(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) struct ishtp_cl_device *device = to_ishtp_cl_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) struct ishtp_cl_driver *driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) if (!device || !dev->driver)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) if (device->event_cb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) device->event_cb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) cancel_work_sync(&device->event_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) driver = to_ishtp_cl_driver(dev->driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) if (!driver->remove) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) dev->driver = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) return driver->remove(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) * ishtp_cl_device_suspend() - Bus suspend callback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) * @dev: device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) * Called during device suspend process.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) * Return: Return value from driver suspend() call.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) static int ishtp_cl_device_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) struct ishtp_cl_device *device = to_ishtp_cl_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) struct ishtp_cl_driver *driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) if (!device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) driver = to_ishtp_cl_driver(dev->driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) if (driver && driver->driver.pm) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) if (driver->driver.pm->suspend)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) ret = driver->driver.pm->suspend(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * ishtp_cl_device_resume() - Bus resume callback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) * @dev: device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) * Called during device resume process.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) * Return: Return value from driver resume() call.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) static int ishtp_cl_device_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) struct ishtp_cl_device *device = to_ishtp_cl_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) struct ishtp_cl_driver *driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) if (!device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) * When ISH needs hard reset, it is done asynchrnously, hence bus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) * resume will be called before full ISH resume
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) if (device->ishtp_dev->resume_flag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) driver = to_ishtp_cl_driver(dev->driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) if (driver && driver->driver.pm) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) if (driver->driver.pm->resume)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) ret = driver->driver.pm->resume(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) * ishtp_cl_device_reset() - Reset callback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) * @device: ishtp client device instance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) * This is a callback when HW reset is done and the device need
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) * reinit.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) * Return: Return value from driver reset() call.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) static int ishtp_cl_device_reset(struct ishtp_cl_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) struct ishtp_cl_driver *driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) device->event_cb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) cancel_work_sync(&device->event_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) driver = to_ishtp_cl_driver(device->dev.driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) if (driver && driver->reset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) ret = driver->reset(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) len = snprintf(buf, PAGE_SIZE, "ishtp:%s\n", dev_name(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) static DEVICE_ATTR_RO(modalias);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) static struct attribute *ishtp_cl_dev_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) &dev_attr_modalias.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) ATTRIBUTE_GROUPS(ishtp_cl_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) static int ishtp_cl_uevent(struct device *dev, struct kobj_uevent_env *env)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) if (add_uevent_var(env, "MODALIAS=ishtp:%s", dev_name(dev)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) static const struct dev_pm_ops ishtp_cl_bus_dev_pm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) /* Suspend callbacks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) .suspend = ishtp_cl_device_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) .resume = ishtp_cl_device_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) /* Hibernate callbacks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) .freeze = ishtp_cl_device_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) .thaw = ishtp_cl_device_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) .restore = ishtp_cl_device_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) static struct bus_type ishtp_cl_bus_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) .name = "ishtp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) .dev_groups = ishtp_cl_dev_groups,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) .probe = ishtp_cl_device_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) .match = ishtp_cl_bus_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) .remove = ishtp_cl_device_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) .pm = &ishtp_cl_bus_dev_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) .uevent = ishtp_cl_uevent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) static void ishtp_cl_dev_release(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) kfree(to_ishtp_cl_device(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) static const struct device_type ishtp_cl_device_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) .release = ishtp_cl_dev_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) * ishtp_bus_add_device() - Function to create device on bus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) * @dev: ishtp device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) * @uuid: uuid of the client
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) * @name: Name of the client
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) * Allocate ISHTP bus client device, attach it to uuid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) * and register with ISHTP bus.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) * Return: ishtp_cl_device pointer or NULL on failure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) static struct ishtp_cl_device *ishtp_bus_add_device(struct ishtp_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) guid_t uuid, char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) struct ishtp_cl_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) spin_lock_irqsave(&dev->device_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) list_for_each_entry(device, &dev->device_list, device_link) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) if (!strcmp(name, dev_name(&device->dev))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) device->fw_client = &dev->fw_clients[
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) dev->fw_client_presentation_num - 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) spin_unlock_irqrestore(&dev->device_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) ishtp_cl_device_reset(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) return device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) spin_unlock_irqrestore(&dev->device_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) device = kzalloc(sizeof(struct ishtp_cl_device), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) if (!device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) device->dev.parent = dev->devc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) device->dev.bus = &ishtp_cl_bus_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) device->dev.type = &ishtp_cl_device_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) device->ishtp_dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) device->fw_client =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) &dev->fw_clients[dev->fw_client_presentation_num - 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) dev_set_name(&device->dev, "%s", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) spin_lock_irqsave(&dev->device_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) list_add_tail(&device->device_link, &dev->device_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) spin_unlock_irqrestore(&dev->device_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) status = device_register(&device->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) if (status) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) spin_lock_irqsave(&dev->device_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) list_del(&device->device_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) spin_unlock_irqrestore(&dev->device_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) dev_err(dev->devc, "Failed to register ISHTP client device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) put_device(&device->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) ishtp_device_ready = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) return device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) * ishtp_bus_remove_device() - Function to relase device on bus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) * @device: client device instance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) * This is a counterpart of ishtp_bus_add_device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) * Device is unregistered.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) * the device structure is freed in 'ishtp_cl_dev_release' function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) * Called only during error in pci driver init path.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) static void ishtp_bus_remove_device(struct ishtp_cl_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) device_unregister(&device->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) * ishtp_cl_driver_register() - Client driver register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) * @driver: the client driver instance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) * @owner: Owner of this driver module
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) * Once a client driver is probed, it created a client
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) * instance and registers with the bus.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) * Return: Return value of driver_register or -ENODEV if not ready
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) int ishtp_cl_driver_register(struct ishtp_cl_driver *driver,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) struct module *owner)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) if (!ishtp_device_ready)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) driver->driver.name = driver->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) driver->driver.owner = owner;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) driver->driver.bus = &ishtp_cl_bus_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) return driver_register(&driver->driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) EXPORT_SYMBOL(ishtp_cl_driver_register);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) * ishtp_cl_driver_unregister() - Client driver unregister
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) * @driver: the client driver instance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) * Unregister client during device removal process.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) void ishtp_cl_driver_unregister(struct ishtp_cl_driver *driver)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) driver_unregister(&driver->driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) EXPORT_SYMBOL(ishtp_cl_driver_unregister);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) * ishtp_bus_event_work() - event work function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) * @work: work struct pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) * Once an event is received for a client this work
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) * function is called. If the device has registered a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) * callback then the callback is called.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) static void ishtp_bus_event_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) struct ishtp_cl_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) device = container_of(work, struct ishtp_cl_device, event_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) if (device->event_cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) device->event_cb(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) * ishtp_cl_bus_rx_event() - schedule event work
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) * @device: client device instance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) * Once an event is received for a client this schedules
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) * a work function to process.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) void ishtp_cl_bus_rx_event(struct ishtp_cl_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) if (!device || !device->event_cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) if (device->event_cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) schedule_work(&device->event_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) * ishtp_register_event_cb() - Register callback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) * @device: client device instance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) * @event_cb: Event processor for an client
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) * Register a callback for events, called from client driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) * Return: Return 0 or -EALREADY if already registered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) int ishtp_register_event_cb(struct ishtp_cl_device *device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) void (*event_cb)(struct ishtp_cl_device *))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) if (device->event_cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) return -EALREADY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) device->event_cb = event_cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) INIT_WORK(&device->event_work, ishtp_bus_event_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) EXPORT_SYMBOL(ishtp_register_event_cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) * ishtp_get_device() - update usage count for the device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) * @cl_device: client device instance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) * Increment the usage count. The device can't be deleted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) void ishtp_get_device(struct ishtp_cl_device *cl_device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) cl_device->reference_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) EXPORT_SYMBOL(ishtp_get_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) * ishtp_put_device() - decrement usage count for the device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) * @cl_device: client device instance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) * Decrement the usage count. The device can be deleted is count = 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) void ishtp_put_device(struct ishtp_cl_device *cl_device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) cl_device->reference_count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) EXPORT_SYMBOL(ishtp_put_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) * ishtp_set_drvdata() - set client driver data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) * @cl_device: client device instance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) * @data: driver data need to be set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) * Set client driver data to cl_device->driver_data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) void ishtp_set_drvdata(struct ishtp_cl_device *cl_device, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) cl_device->driver_data = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) EXPORT_SYMBOL(ishtp_set_drvdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) * ishtp_get_drvdata() - get client driver data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) * @cl_device: client device instance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) * Get client driver data from cl_device->driver_data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) * Return: pointer of driver data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) void *ishtp_get_drvdata(struct ishtp_cl_device *cl_device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) return cl_device->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) EXPORT_SYMBOL(ishtp_get_drvdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) * ishtp_dev_to_cl_device() - get ishtp_cl_device instance from device instance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) * @device: device instance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) * Get ish_cl_device instance which embeds device instance in it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) * Return: pointer to ishtp_cl_device instance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) struct ishtp_cl_device *ishtp_dev_to_cl_device(struct device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) return to_ishtp_cl_device(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) EXPORT_SYMBOL(ishtp_dev_to_cl_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) * ishtp_bus_new_client() - Create a new client
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) * @dev: ISHTP device instance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) * Once bus protocol enumerates a client, this is called
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) * to add a device for the client.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) * Return: 0 on success or error code on failure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) int ishtp_bus_new_client(struct ishtp_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) char *dev_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) struct ishtp_cl_device *cl_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) guid_t device_uuid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) * For all reported clients, create an unconnected client and add its
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) * device to ISHTP bus.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) * If appropriate driver has loaded, this will trigger its probe().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) * Otherwise, probe() will be called when driver is loaded
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) i = dev->fw_client_presentation_num - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) device_uuid = dev->fw_clients[i].props.protocol_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) dev_name = kasprintf(GFP_KERNEL, "{%pUL}", &device_uuid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) if (!dev_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) cl_device = ishtp_bus_add_device(dev, device_uuid, dev_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) if (!cl_device) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) kfree(dev_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) kfree(dev_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) * ishtp_cl_device_bind() - bind a device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) * @cl: ishtp client device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) * Binds connected ishtp_cl to ISHTP bus device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) * Return: 0 on success or fault code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) int ishtp_cl_device_bind(struct ishtp_cl *cl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) struct ishtp_cl_device *cl_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) int rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) if (!cl->fw_client_id || cl->state != ISHTP_CL_CONNECTED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) rv = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) spin_lock_irqsave(&cl->dev->device_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) list_for_each_entry(cl_device, &cl->dev->device_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) device_link) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) if (cl_device->fw_client &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) cl_device->fw_client->client_id == cl->fw_client_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) cl->device = cl_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) rv = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) spin_unlock_irqrestore(&cl->dev->device_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) return rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) * ishtp_bus_remove_all_clients() - Remove all clients
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) * @ishtp_dev: ishtp device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) * @warm_reset: Reset due to FW reset dure to errors or S3 suspend
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) * This is part of reset/remove flow. This function the main processing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) * only targets error processing, if the FW has forced reset or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) * error to remove connected clients. When warm reset the client devices are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) * not removed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) void ishtp_bus_remove_all_clients(struct ishtp_device *ishtp_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) bool warm_reset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) struct ishtp_cl_device *cl_device, *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) struct ishtp_cl *cl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) spin_lock_irqsave(&ishtp_dev->cl_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) list_for_each_entry(cl, &ishtp_dev->cl_list, link) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) cl->state = ISHTP_CL_DISCONNECTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) * Wake any pending process. The waiter would check dev->state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) * and determine that it's not enabled already,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) * and will return error to its caller
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) wake_up_interruptible(&cl->wait_ctrl_res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) /* Disband any pending read/write requests and free rb */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) ishtp_cl_flush_queues(cl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) /* Remove all free and in_process rings, both Rx and Tx */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) ishtp_cl_free_rx_ring(cl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) ishtp_cl_free_tx_ring(cl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) * Free client and ISHTP bus client device structures
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) * don't free host client because it is part of the OS fd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) * structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) spin_unlock_irqrestore(&ishtp_dev->cl_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) /* Release DMA buffers for client messages */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) ishtp_cl_free_dma_buf(ishtp_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) /* remove bus clients */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) spin_lock_irqsave(&ishtp_dev->device_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) list_for_each_entry_safe(cl_device, n, &ishtp_dev->device_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) device_link) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) cl_device->fw_client = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) if (warm_reset && cl_device->reference_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) list_del(&cl_device->device_link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) spin_unlock_irqrestore(&ishtp_dev->device_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) ishtp_bus_remove_device(cl_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) spin_lock_irqsave(&ishtp_dev->device_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) spin_unlock_irqrestore(&ishtp_dev->device_list_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) /* Free all client structures */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) spin_lock_irqsave(&ishtp_dev->fw_clients_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) kfree(ishtp_dev->fw_clients);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) ishtp_dev->fw_clients = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) ishtp_dev->fw_clients_num = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) ishtp_dev->fw_client_presentation_num = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) ishtp_dev->fw_client_index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) bitmap_zero(ishtp_dev->fw_clients_map, ISHTP_CLIENTS_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) spin_unlock_irqrestore(&ishtp_dev->fw_clients_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) EXPORT_SYMBOL(ishtp_bus_remove_all_clients);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) * ishtp_reset_handler() - IPC reset handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) * @dev: ishtp device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) * ISHTP Handler for IPC_RESET notification
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) void ishtp_reset_handler(struct ishtp_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) /* Handle FW-initiated reset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) dev->dev_state = ISHTP_DEV_RESETTING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) /* Clear BH processing queue - no further HBMs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) spin_lock_irqsave(&dev->rd_msg_spinlock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) dev->rd_msg_fifo_head = dev->rd_msg_fifo_tail = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) spin_unlock_irqrestore(&dev->rd_msg_spinlock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) /* Handle ISH FW reset against upper layers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) ishtp_bus_remove_all_clients(dev, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) EXPORT_SYMBOL(ishtp_reset_handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) * ishtp_reset_compl_handler() - Reset completion handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) * @dev: ishtp device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) * ISHTP handler for IPC_RESET sequence completion to start
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) * host message bus start protocol sequence.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) void ishtp_reset_compl_handler(struct ishtp_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) dev->dev_state = ISHTP_DEV_INIT_CLIENTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) dev->hbm_state = ISHTP_HBM_START;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) ishtp_hbm_start_req(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) EXPORT_SYMBOL(ishtp_reset_compl_handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) * ishtp_use_dma_transfer() - Function to use DMA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) * This interface is used to enable usage of DMA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) * Return non zero if DMA can be enabled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) int ishtp_use_dma_transfer(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) return ishtp_use_dma;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) * ishtp_device() - Return device pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) * This interface is used to return device pointer from ishtp_cl_device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) * instance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) * Return: device *.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) struct device *ishtp_device(struct ishtp_cl_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) return &device->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) EXPORT_SYMBOL(ishtp_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) * ishtp_get_pci_device() - Return PCI device dev pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) * This interface is used to return PCI device pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) * from ishtp_cl_device instance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) * Return: device *.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) struct device *ishtp_get_pci_device(struct ishtp_cl_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) return device->ishtp_dev->devc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) EXPORT_SYMBOL(ishtp_get_pci_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) * ishtp_trace_callback() - Return trace callback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) * This interface is used to return trace callback function pointer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) * Return: void *.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) void *ishtp_trace_callback(struct ishtp_cl_device *cl_device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) return cl_device->ishtp_dev->print_log;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) EXPORT_SYMBOL(ishtp_trace_callback);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) * ish_hw_reset() - Call HW reset IPC callback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) * This interface is used to reset HW in case of error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) * Return: value from IPC hw_reset callback
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) int ish_hw_reset(struct ishtp_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) return dev->ops->hw_reset(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) EXPORT_SYMBOL(ish_hw_reset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) * ishtp_bus_register() - Function to register bus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) * This register ishtp bus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) * Return: Return output of bus_register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) static int __init ishtp_bus_register(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) return bus_register(&ishtp_cl_bus_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) * ishtp_bus_unregister() - Function to unregister bus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) * This unregister ishtp bus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) static void __exit ishtp_bus_unregister(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) bus_unregister(&ishtp_cl_bus_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) module_init(ishtp_bus_register);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) module_exit(ishtp_bus_unregister);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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